Why are my render animation pictures after frame 100 only gray?
You inserted the scene in the Video Sequence Editor but the clip length stayed at 100 frames. In the Post Processing tab in Render settings Sequencer is checked so its being taken into account when rendering.





Solution: Uncheck the Sequencer in Render Settings or re-add the scene in the sequencer so the strip is 120 frames long. I recommend option 1.